Bolt-trimming machine.



J. A. COLLINS.

BOLT TRIMMING MACHINE.

- APPLIOATION FILED OUT. 9, 1911.

1,042,089, Patented Oct. 22, 1912.

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WITNESSES: NVENTOR )4 4g I BY ATTORNEY COLUMBIA PLANOGRAPH :0" WASHINGTON. D c.

J. A. COLLINS. BOLT TRIMMING MACHINE.

APPLICATION FILED OUT. 9, 1911.

Patented 0ct.'22, 1912.

2 SHBETS-SHBET 2.

M INVENTOR BY WITNESSES:

ATTORN EY COLUMBIA PLANOGRAPH 60..MSNINHTON. D. C.

UNITED STATES PATENT OFFICE.

JOHN A. COLLINS, OF VERONA, PENNSYLVANIA, ASSIGNOR TO PITTSBURG SCREW & BOLT COMPANY, A CORPORATION OF PENNSYLVANIA.

BOLT-TRIIJIIVIING MACHINE.

Specification of Letters Patent.

Patented Oct. 22,1912.

To all whom "it may concern:

Be it known that 1, JOHN A. CoLLiNs, a citizen of the United States, and a resident of Verona, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Bolt-Trimming Machines, of which the following is a specification.

My invention relates to machines for trimming bolt heads and it has for its object to provide a machine for that purpose which shall be simple and compact in construction and certain and reliable in operation, and also automatic, except for the placing of the bolts to be trimmed in their initial positions in the machine.

In the manufacture of bolts by certain processes, the bolt blanks have substantially circular fins or flanges between the bolt heads proper and the shanks, which must be removed, prior to cutting the threads, in order to provide a finished article of the desired contour. In order to remove the above-mentioned flanges or fins effectively and expeditiously, I have devised the machine shown in the accompanying drawings, in which Figure 1 is a side elevation, Fig. 2 is a front elevation of the machine, Fig. 3 a

view, partially in plan and partially in horizontal section, showing the die-carrying member and the locking and releasing means therefor, Fig. 4; a detail front elevation of a portion of the machine shown in Figs. 1 and 2, certain of the parts being shown in operating positions which differ from those indicated in Fig. 2, and F ig. 5 a detail view of one of the parts shown in Figs. 2 and 4t.

The frame 1 of the machine comprises a base portion, here shown as in the form of legs 2, and two parallel upright members 3 and at joined together by a horizontal portion 5 which rests upon or is formed as an integral casting with the legs 2. The uprights 3 and 1 are provided with vertical guideways 6 and 7 in their inner faces to receive the guide flanges 8 of a reciprocating member 9 to which is pivotally attached the lower end of a pitman 10. The upper end of the pitman is carried by the eccentric portion 11 of a crank shaft 12 that has its bearings in the upper ends of the uprights 3 and et. The shaft 12 projects beyond the upright- 3 and has mounted upon and suitably keyed to it a disk 13, having a cam pro ection 14:. The outer end of the shaft 12 is provided with a disk 15 having an eccentric pin 16, on which is mounted the upper end of a rod 17, the lower end of which is screw-threaded to receive the upper end of a connecting sleeve 18. The lower end of the sleeve 18 is screwed upon the upper end of a rod 19, so that the effective length of the combined rods may be varied by turning the sleeve in the one or the other direction.

The lower end of the rod 19 is pivotally connected to one end of an arm 20, the other end of which is loosely mounted upon a shaft 21 having bearings in one of the legs 2 and a bracket 22 that is bolted to the under side of the part 5. The shaft 21 is provided with a ratchet wheel 23, and a downwardly projecting portion of the arm is provided with pawls 24 which are normally held in engagement with the ratchet wheel by springs 25 but are movable out of such engagement by means of links 26 and a manually-operated lever 27 The inner end of the shaft 21 is provided with a bevel gear wheel 28 that meshes with a bevel gear wheel 29 with which the lower end of a vertical shaft 30 is provided. Mounted rigidly upon the upper-end of the shaft 30 is a die-carrying member 31 having a plurality of dies 32 (here shown as six in number and of the same shape and size as the head of the bolt to be trimmed by the machine). The edge of the member 31 is provided with a plurality of notches 33 corresponding, in number and spacing, to the dies, and, mounted in horizontal guideways 34 adjacent to the ring, is a latch member 35 having an inner end 36 of such size and shape as to fit into one of the recesses 33 in the member 31, the latch member being normally pressed inwardly toward the member 31 by means of a helical spring 37 The rear end of the latch member 35 is provided with a vertical projection 38 in position to be engaged by the lower end of a lever 39, substantially the middle portion of which is pivotally supported by a bracket 10 upon the upright 3 of the frame 1. The upper portion 41 of the lever 39 is curved and extends upwardly, its upper end being provided with a roller 42 to engage the surface of the cam 13, so that, when the projecting portion 14 of the cam engages the roller, the lower end of the lever 39 will engage the projection 38 and withdraw the latch end 36 from the notch or recess in the member 31 in which it happens to be located when this action occurs.

The vertically reciprocating member 9 is provided with a plunger-supporting frame comprising a horizontal bar 43 and a pair of rods 44 that extend vertically through holes in the member 9. A hollow punch 46 is mounted in the lower portion of the member 9 and is held in position by a plate 9 that is bolted to the side of member 9 and by a tubular adjusting nut 47 that is screwed into said member and engages the upper end of the punch. A screw-threaded plunger rod 48 extends through the bar 43 and into the hollow punch 46 and is fastened to the bar by a set-screw 49. The external contour of the punch 46 preferably corre sponds substantially to that of the bolt head in order to effectively shear off the fin. The crank arms 50 of the shaft 12 are provided with projections 51 which engage the upper inclined surfaces of the heads 45 once during each rotation of the shaft to force the cross bar 43 and the pliinger rod 48 downward independently of the punch 46. The member 9 is also provided with a spring-sup ported plunger rod 52 having a conical recess in its lower end or face, the springs 53 being housed in an adjustable cylinder 54. The punch 46 and the plunger rod 52 are so spaced apart that the former will engage the fin of a bolt located in one die at the same time that the latter is engaging the end ofanother bolt located in another die.

The operation of the machine is as follows: The attendant inserts a bolt head in a die 32 at the front of the machine, as inclicated in Fig. 2 of the drawings, and, as the main shaft rotates, it moves the die-carrying member one space, through the action of the eccentric pin 16, the rod 17, 18, 19, the arm 20, the pawls 24, the ratchet wheel 23, the shaft 21 and the bevel gears 28 and 29, the latch 35 being withdrawn, at the proper instant, by the action of the cam projection 14 upon the roller 42 at the upper end of the lever 39, 41. This movement of the diecarrying member 31 carries the bolt beneath the spring-supported plunger-rod 52, which descends at the proper time and, by reason of its yielding support and a conical recess in its face, it seats the bolt firmly in position and also adjusts it so that it is in a perfectly upright position. The seated and adjusted bolt is carried by one or more succeeding movements of the die-carrying member to suchposition as to be engaged by the punch 46 which cooperates with the die to shear off the fin. The plunger rod 48 is then depressed by the engagement of the projections 51 with the inclined surface of the heads 45 to force the bolt through the die plate into a suitable receptacle below, the positions of the punch 46 and the plunger rod 46 just prior to the independent movement of the latter being indicated in Fig. 4.

It is understood that all of the dies may be supplied with bolts before the machine is started and thereafter it will merely be necessary for the attendant to insert a bolt at each movement of the die-carrying member, so that the machine is substantially continuous in operation, the descent of the head serving, each time, to both set and adjust a bolt and also to remove the fin and force the bolt through the die. It will be also understood that the plunger rod 46 may be adjusted longitudinally by turning it in the one or the other direction, after loosening the screw 49, and that the punch 46 may be adjusted by means of the nut 47.

The structural details, as regards the number of and relative location of the dies in the member 31, the shape and movements of the said member, and the means for operating it, and also the specific details of the punch and plunger rods and of the lock ing and releasing mechanism may be materially varied from what is here shown and described, within the scope of the claims, without departing from the spirit and scope of my invention.

I claim as my invention:

1. The combination with a frame and a movable member having a plurality of trimming dies, of means for intermittently moving said. member a predetermined distance, means for locking said member in the position to which it is moved, and a reciprocating member having a bolt-adjusting tool and a tool for forcing the adjusted bolts through the trimming dies.

2. The combination with a frame and a movable die-carrying member, of means for intermittently actuating said member, means for locking the member in the position to which it is actuated, and a member reciprocating at right angles to the movement of the die-carrying member and provided with means for seating and adjusting a bolt and with means for forcing the seated and adjusted bolt through the dies.

3. The combination with a frame comprising uprights provided with guideways, of a plunger-carrying member mounted in said guideways, a shaft for reciprocating said member, a die-carrying member mounted to move in a substantially horizontal plane, means for intermittently actuating said die-carrying member and locking it in its adjusted positions and means carried by the reciprocating member for seating bolts in the die-carrying member and means for forcing the same through the dies.

4. In a bolt-trimming machine, the combination with a horizontally movable memher having a set of trimming dies that are adapted to receive the heads of bolts having upwardly projecting shanks, of a vertically reciprocating member having a seating and adjusting plunger and a punch, and means for moving the die and bolt carrying mem her in successive steps to present two bolts for respective simultaneous engagement by said plunger and said punch.

5. In a bolt-trimming machine, the combination with a die-carrying member, means for moving said member step'by-step, and means for locking said member at the end of each movement step, of a reciprocating member having a seating and adjusting plunger to engage the end of an upwardly projecting bolt shank in each position in which the die-carrying member is locked and having a combined punch and plunger for simultaneously forcing a previously adjusted bolt through the die.

6. The combination with a member having a set of bolt-trimming dies, and means for moving said member step-by-step, of a reciprocating member having a bolt-adjusting device, a plunger carried by said reciprocating member, and means for actuating said plunger independently of said member to force an adjusted bolt through the die.

7. In a bolt-trimming machine, the combination with a rotatable block having a set of trimming dies, means for intermittently actuating said block, and means for locking it in each position to which it is moved, of a reciprocating member having a yielding bolt-adjusting device and a plunger, and means for operating said plunger independently of said member to force an adjusted bolt through the die.

8. In a bolt-trimming machine, the combination with a vertically reciprocating member having a bolt-adjusting plunger and a bolt-forcing plunger, of means for operating said member, means for imparting an additional movement to the bolt-forcing plunger, a block having a set of dies, means for actuating said block to locate said dies successively beneath said plungers, means for latching the block in each position to which it is moved, and means for releasing it upon completion of the plunger operation.

9. In a bolt-trimming machine, the combination with a die to receive the head of a bolt having an upwardly projecting shank, and a hollow punch to receive the shank and cooperate with the die in shearing a fin from the head, of a plunger rod projecting into the punch to engage the end of the shank, and means for imparting an independent movement to said plunger rod to force the bolt through the die.

10. In a bolt-trimming machine, the combination with a set of dies to receive the heads of bolts having upwardly projecting shanks, and means for moving them horizontally to difierent positions, of a vertically reciprocating member provided with a hollow punch to receive the bolt shanks and cooperate with the respective dies to shear fins from the bolt heads and with a plunger rod that projects into said punch, and means for independently actuating said rod to force the trimmed bolts through the dies.

In testimony whereof, I have hereunto subscribed my name this 28th day of September, 1911.

JOHN A. COLLINS.

WVitnesses:

lVEsLEY Gr. CARR, B. B. HINES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

